_Distribution._--The Cascade Mountains from the vicinity of Mount Adams north. The zone of intergradation between _shawi_ and _immunis_ is in the rugged, inaccessible mountains between Mount Rainier and Mount Adams. =Thomomys talpoides limosus= Merriam _Thomomys limosus_ Merriam, Proc. Biol. Soc. Washington, 14:116, July 19, 1901. _Thomomys talpoides limosus_ Goldman, Jour. Mamm., 20:235, May 15, 1939. _Type._--Obtained at White Salmon, Klickitat County, Washington, by J. A. Loring on June 26, 1897; type in United States National Museum. _Racial characters._--Similar to _immunis_ but darker with smaller, shorter skull. _Measurements._--One male and 13 female topotypes average, respectively: total length 210, 198; length of tail 55, 56; hind foot 30, 28. _Distribution._--The lower Columbia River Valley, from the type locality east to the Columbian Plateau. =Thomomys talpoides douglasii= (Richardson) _Geomys douglasii_ Richardson, Fauna Boreali-American, 1:200, 1829. _Geomys fuliginosus_ Schinz, Syn. Mamm., 2:136, 1846 (type from "Habitat ad fluvium Columbia"). _Thomomys douglasii_ Allen, Bull. Amer. Mus. Nat. Hist., 5:66, April 28, 1893. _Thomomys douglasi douglasi_ Bailey, N. Amer. Fauna, 39:116, November 15, 1915. _Thomomys talpoides douglasii_ Goldman, Jour. Mamm., 20:234, May 15, 1939. _Type._--Obtained at Fort Vancouver (now the city of Vancouver), Clark County, Washington, by David Douglas, probably in 1825. Probably not now in existence. _Racial characters._--A medium-sized, yellowish gopher with tiny, pointed ears and very small postauricular patches. _Measurements._--Two male and 10 female topotypes average, respectively: total length 227, 213; length of tail 68, 63; hind foot 30, 30; and weight 148, 117 grams. _Distribution._--Known only from Clark County. =Thomomys talpoides glacialis= Dalquest and Scheffer _Thomomys talpoides glacialis_ Dalquest and Scheffer, Proc. Biol. Soc. Washington, 55:97, August 13, 1942. _Type._--Obtained 2 miles south of Roy, Pierce County, Washington, by W. W. Dalquest, on December 19, 1941; type in United States National Museum. _Racial characters._--A dark, yellowish-brown gopher with orange-tinged underparts. _Measurements._--Twenty male and 17 female topotypes average, respectively: total length 225, 220; length of tail 72, 71; hind foot 30, 30; and weight 128, 116 grams. _Distribution._--Known only from Roy Prairie, Pierce County. =Thomomys talpoides tacomensis= Taylor _Thomomys douglasii tacomensis_ Taylor, Proc. Biol. Soc. Washington, 32:169, September 30, 1919. _Thomomys talpoides tacomensis_ Goldman, Jour. Mamm., 20:235, May 15, 1939.